ben240sx

yeah i did dat already and its still wont pass 2000 rpms im thinking is the wiring or the throdle body.... and yeah im thinking if my cousin dont buy it from me ima go to the junk yard and buy either top to make it a coupe or the whole shell to make it a hatch.. but back to tha subject am i missing sumthing.. dam i think im in over my head with this project but any advise or help would be really apreciated thankz